CPU board probing is very challenging. This functional test fixture uses almost every CPU board connector probing method imaginable. The fixture has high-density X-probes, floated side and bottom probing, flex-circuit engagement and probing, pneumatic side access, fiber optic probing, and pneumatic push-button actuation. It engages the following connectors with floating probe blocks: RJ-45 Ethernet, USB, micro-USB, HDMI, 3.5 mm audio plug and DC power plug.